Research Of Low Energy Clustering Routing Protocol In Wireless Sensor Network

Wireless sensor network is a self-orgnized wireless network which comprises hundreds of sensors. Its purpose is to perceive, gather and process the information of targets in network's coverage collaboratively and to transmit it to the observer. As wireless sensor network has characteristics of no need of support by fixed network, fast networking, strong survivability and so on, it attracts the attention of many governments, enterprises and the academic community.Wireless sensor network's own characteristics decide that the primary objective of its routing protocol's design is to reduce energy consumption and prolong network's life. How to design energy efficient routing protocol becomes the hot spot in the research of sensor network. This thesis expounds the research's background, purpose and value, introduces wireless sensor network and its routing protocols and expatiates Low Energy Adaptive Clustering Hierarchy Protocol (LEACH), which is a typical representative of clustering routing protocol in wireless sensor network. It introduces LEACH's presupposition, energy model, specific content, key technologies and merits and faults. To make up for the shortcomings of LEACH, Tree-based Low Energy Clustering Routing Protocol (TLECR) is proposed in this thesis. It adopts the largest value cluster head selection algorithm and the cluster head routing tree mechanism. Therefore, it is able to guarantee the number of cluster heads is the optimal value in almost every round, select cluster heads based on nodes' residual energy and transmit data to the base station through routing tree.Through the simulation experiment, we compare the performance of TLECR and LEACH. From the results of experiment, we can see that compared with LEACH, TLECR lowers nodes' energy consumption, prolongs network's life, balances nodes' loads and improves network's scalability.